Generally, 45-60 minutes is almost enough, and the breathing lamp behind it will be off by itself after it is fully charged, and you can pull it off when you see it. Generally, if it is fully charged, it is almost enough to use one day, I am not particularly addicted to smoking, usually more than half a package of cigarettes a day, and it seems that after using RELX, it is generally returned at night to charge an hour, and the next day is enough to use.